Voicing for sustain: was Downbearing and Tone

[Mike Spalding]

Ric,

Yes, it's been a while since this one started.  Situation is: just finishing
a rebuild, which included new bridge pins set in epoxy, and re-ground capo
bar, new Abel Encores.  Downbearing possibly in the heavy side, about 1
degree.  Being cautious, maybe too much so, about avoiding excessive
needling.

Also, this being a M&H A with individually tunable aliquots, I have made an
attempt at tuning the rear duplex.  Well, not exactly "Individually
tunable", as the aliquot can be positioned correctly for 2 strings of a
tri-chord, but the 3rd string must be accepted where it is.  Tuning seems
very sensitive to little inaccuracies in bridge termination, very hard to
get rid the last couple of beats.  I'm not sure what difference, if any,
that tuning the duplex has made.  Perhaps the tuning must be very precise in
order to triple the sustain, or whatever it is supposed to do.

Mike

----- Original Message -----
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "Pianotech" <pianotech@ptg.org>
Sent: Thursday, March 27, 2003 6:12 AM
Subject: Re: Voicing for sustain: was Downbearing and Tone


> Mike,
>
> Xcuse me if I have lost track of where this thread is at. This is in the
capo
> section tho correct ? If so, you might try takeing the range of notes
worst
> affected and pull of the strings to reshape / dress up the capo bar, and
while
> you have the strings off drip a bit of CA into the bridge pins. Capo bar
wear
> can definatly be a contributing factor to lost sustain.
>
> The CA just plain seems to always contribute positively to good tone. I am
> getting to the point where I nearly always apply a few drops to the bridge
pins
> whenever I have a string off.
>
> Just a thought
>
> RicB
>
> Mike Spalding wrote:
>
> > David,
> >
> > Thanks for the outline - I've been working this one "in my spare time":
do
> > a little, listen, sleep on it, listen again, do a little more, etc.  Got
a
> > lucky break, the owners went on a month-long vacation, so I don't need
to
> > rush through this.  Strike point, shape, and string fit were all good.
> > Pluck sustain, while nothing to write home about, was longer than hammer
> > sustain.  Shoulder needling and crown pounding are gradually producing
> > results.  The "short sustain zone" is getting smaller, only about 7 or 8
> > notes left now to bring out.  Will probably also do a little
> > filing/polishing with very fine paper.
> >
> > regards, and thanks
> >
> > Mike Spalding RPT
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> UiB, Bergen, Norway
> mailto:rbrekne@broadpark.no
> http://home.broadpark.no/~rbrekne/ricmain.html
>
>
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